A glitch that hit trading on the Nasdaq stock exchange for the second time in recent weeks has raised questions about whether US regulators should step in to shake up the industry.

Data about the prices of thousands of stocks listed on Nasdaq unexpectedly stopped being processed for five minutes on Wednesday, in a smaller echo of a computer problem that halted trading for three hours in mid-August.

“We are not inspired by the fact that this has become a recurring issue,” Peter Sorrentino, a senior vicepresident at Huntington Asset Advisors, said. “This type of thing does an awful lot